Most articles will not specifically say what meta approach they are using. You have to understand the theory well enough to be able to recognize it even it is not labeled.
The following are "quick and dirty" ways to help find articles that likely use a certain meta theory. It will not get everything, nor is it guaranteed to get accurate representations of a meta-theory. However, they might help you find examples to understand what these perspectives look like in practice.
Strategy: Search for your general research topic AND one of the suggestions below:
Post-positive:
computational analysis
"predictive model"
Interpretive:
hermeneutic*
phenomenolog*
Critical Theory:
hegemony
marginaliz*
JN "critical discourse studies"
Postmodern:
Go to Communication Source and search for postmodern* as a subject.
